FILE - In this June 30, 2011 file photo, beach-goers walk on the sand near the San Onofre nuclear power plant in San Clemente, Calif. A report commissioned by an environmental group warned Tuesday, May 15, 2012 that running California's San Onofre nuclear plant at reduced power would not resolve problems with badly worn tubing that have kept its twin reactors offline for more than three months, and might make it worse. (AP Photo, Lenny Ignelzi, File)

Associated Press
FILE - In this June 30, 2011 file photo, beach-goers walk on the sand near the San Onofre nuclear power plant in San Clemente,  Calif. A report commissioned by an environmental group warned Tuesday, May 15, 2012 that running California's San Onofre nuclear plant at reduced power would not resolve problems with badly worn tubing that have kept its twin reactors offline for more than three months, and might make it worse. (AP Photo, Lenny Ignelzi, File)
FILE - In this June 30, 2011 file photo, beach-goers walk on the sand near the San Onofre nuclear power plant in San Clemente, Calif. A report commissioned by an environmental group warned Tuesday, May 15, 2012 that running California's San Onofre nuclear plant at reduced power would not resolve problems with badly worn tubing that have kept its twin reactors offline for more than three months, and might make it worse. (AP Photo, Lenny Ignelzi, File)
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